Air-pump for vacuum-cleaners.



LWIEDEMAANN QL-H.' TMPLIN..

l AIR PUMP FOR VACUUM CLEANERS.

. APPLICATION FILED JUNE 12. 1909.-'

Patented Feb. 1,' 191.6.

3 SHEETS-SHEET 1- T. WIEDEMANN I I. H. TEMPUN. -AIR P-UMP F OR.VACUlIIM CLEANERS'.

- APPLICATION FILED JUNE 12,1999. l

' Patented Feb. 1, 1916.

la sHETs-SHEET 2.

@1151-7 III sTA Es ATENTOFEICE,

THEoDoRE WIEDEMANN AND JOSEPH TEMPLIN, OPPHILADELPHIA, PENNSYL- VANIA, AsSIGNoRS, BY MESNE ASSIGNMENTS, To SANTO MANUFAcTURING CoivI- PANY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0E DELAWARE.

AIR-PUMP ,PoR VACUUM-CLEANERS.

To all whom itmag/ concern: A Be it known that we, THEoDoRE WIEDE- MANN and 'JOSEPH H. TEMPLIN both citizens of the United States, residing in the city and county of Philadelphia, State 0f Pennsylvania, have invented a new and useful Air-Pump for Vacuum-Cleaners, of which theL following is a specification.

Our present invention relates to air pumps especially adapted for use in conjunction with the well known vacuum cleaners and consists broadly of a novel construction of an air pump in which vthe suction creating member of `the pumping mechanism is provided with a connecting rod, one end of which is fastenedthei'eto in such a manner that no joint will be formed at such point while the other end of the connecting rod is mounted directly on the crank of the motor, and in the present embodiment, for the purpose of illustration the movable :member of the suction` creating device is shown as comprising a diaphragm although of course a piston may be employed if desired. Y

In the suction creating devices or pump mechanisms heretofore employed in this art it has been deemed impracticable to form a direct connection between the motor andthe movable member of the suction creating del vic@ especially in cases where a standard electric motor is employed, and in so far as we are aware, we are the first in the art to vemploy in a pumping mechanism a suction member directly connected to a high speed motor or a diaphragm having its outer periphery ,rigidly supported and a connecting rod secured thereto'the other end of which is mounted on the crank of the motor. We have found, however, by numerous experiments that if the connecting rod is rigidly fastened to the diaphragm or suction member and the other end of the rod mounted on the crank of a motor that a standard electric motor may be employed which runs at a very high speed, in practice between 1200 and 3500 revolutions per minute, so that `a strong suction or vacuum can be produced with a machine of very light weight, thereb v enabling us to'` produce a vacuum clean` Specification of Letters Patent.

To the. above ends our present invention consists 1n its broad scope of a pumping Patented Feb. 1, 1916.

'Appiieation-fiied June 12,1909. seriaiNo. 501,701.

mechanism including a suction creating member having a rod fastened rigidly thereto the other end of the rod being'mounted on the crank of a high speed motor and the suction creating member coperatingwith a pulsation chamber provided with valve controlled inlet and outlet poits.

Our invention further consists of a novel construction of a casingw'vhich is made up of'sections so that one section may be readily removed for the purpose of inspection or repairs, the casing being adapted to entirely surround the pumping mechanism and the motor, said pumping mechanism discharging in the present instance directly into the casing, which latter is provided with an eX- haust port to the atmosphere whereby a pressure chamber is formed in which the motor is' located so that the motor is properly cooled at all times..

Our invention further consists o'f a novel construction of a pump casing provided with valver controlled inlet and outlet ports and on which the suction creating member of the pump is mounted in a novelv manner. Our invention Afurther consists of a novel manner of mounting the in otor so that the same iS suitably supported directly above the pump. I,

It further `consists of anovel construction of a pumping mechanism having inlet and outlet ports and .a novel construction of y valve' mechanism coperating with saidy ports. ,Y y

It further consists of other novel features of construction, all' as will be hereinafter fully set forth.

For the purpose of illustrating our invention v'we have shownin tli'eaccompanying drawings one form thereof since, this embodiment'has been found in actual practice to give satisfactory and reliable results, although it is lto be understood that the various instrumentalities 0f which our invention consists can be variously arranged and orga-nized and our invention is not'liinited to the precise arrangement and organization of these instrumentalities as herein Set forth.

Figure 1 represents a perspective View of an air pump for vacuum cleaners embodying our invention, 'the cover being shown in open position and alportion thereof being broken away. Fig.' 2 represents a sectional Fig. 3 represents a sectional view of the suction creating device,`

view o'f ourdevice.

certainl portions thereof being removed; for the sake of `clearness of illustration. Fig 4 represents a plan viewV of the valve 'mechanism employed. l n Similar numerals of reference indicate corresponding parts in. thegures.

` Referring to the drawingsinthe-present instance we have shown the .casing as comprising 'a bottom section l and a top section 2 which are suitablypivoted- `together by means of the hinges 3 or'equivalent means, the cover being provided with suitable lugs 4 with which the clasps vcarried by the base portion 1 engage to secure the parts'in assembled position.

AThe base portionil is preferably provided with a drawer 6 removably mounted therein it being noted that the' clasps 5 are carried by the drawer 6 so that when the parts are in assembled position there'will be no leakage of air at the joints formed by such parts.

7 designates an airinlet leading to the ob- .Y

1 servation glass 8 whichdischarges into the chamber 9 the latter forming a vacuum orliltering compartment. The inlet 7 is adapt- 3 ed to be connected with a suitable hose to which the cleaning nozzle is attached, so that the condition ofthe air enteringthe machine through the suction nozzle may be readily observed by the operator as the dust laden air passes through the observation which. will be best understood by reference i' to Fig. 4. This valve consists in the present inst-ance of a semi-circular disk of leather,

' rubber or other suitable material which is supported at its inner-end -by means of a plate 18, provided with v'suitable fastening,`

devices 19, it beingnoted that extending outwardly from ybeneath the plate are the spring fingers 20- which engage Athe valve 17 and maintain the tion.

The valve'ports are located in a plate 21 which Ais seated in a recessin the pump cas,- -ing 15 an'df'remvably secured .in position by means of suitable fastening devices 22, it

being-.seen that a'packing-strip 23 is provided in 'orden thatran air tight joint will be made between the plate 21l and the pump casing 15. A i A The casing 15'is provided. with a laterally same normally in closed posi extending partitioning member 24 which dition to thevalve 17 and also provided in a l Vsimilar manner with springs 28 which nor- `mally tend to maintain the valve in its closed posit-ion. The upper portion of the casing 15 is preferably depressed ordeflected, as

indicated at 29, and between this deflected portion and the. diaphragm 30 is located the -pulsation chamber 31. The diaphragm 30 has its outer periphery extending beneath the ring 32, suitablefastening devices 33 be- .ing provided which pass through the ring 32, the outer periphery of the diaphragm 30 and `linto engagement with the top of the -pump' casing 15, thereby rigidly supporting the outer periphery o f the diaphragm The pump casing is preferably cored out or recessed as indicated at 34 in order to render the same as light as practicable,

35 designates a connecting rod the inner end vof which. is preferably provided with an enlarged head or plate 36 preferably of thin material or apertured and which is secured in any suitable manner to the diaphragm 30, in the present instance, the washer 37 being provided which is secured to the diaphragm 30 and the head 36 of the rod -35 by means of suitable fastening` devicesl 38` as will be readilyapparent by reference to Fig. 3. The outer end of the connecting rod 35 forms a split collar in which the crank pin 39 is adapted to be'seated,| said pin having preferably mounted thereon a roller bearing 40L seated inthe collar of the connecting rod and secured thereto by means of a screw 41 or equivalent fastening device. The crank pin 39 is mounted on the crank 42 which latter also carries a balance wheel 43 theV same being connected to the shaft of the motor 44 in any suitable manner.

In order to support the motor 44 the pump casing 15 is provided with standards 45 and standards 46 which latter pass through the ring 32, the diaphragm 30 and the pump ing-therearound. The exhaust air passing' into the casing 2 exhausts therefrom through the main exhaust port 50. l.

51 designates a A'conductor which is adapted to be secured to an ordinary lamp socket the same passing to the motor 44 in .casing 15, it being noted that a suitable 'Y the usual manner and the casing V29. is prov vided with a suitable switch for controlling` y ing compartment 9.

the motor 44. The operation of our novel construction will now be readily understood and is as follows: The inlet 7 being rst connected with the suction hose the switch is actuated thereby starting the motor 44, whereupon the connecting rod 36 will be reciprocated and owing to the manner in which this rod is fixed to the diaphragm the inner end of the rod in proximity to the diaphragm will be given a combined oscillatory and ,recipiocatory movement. As the. diaphragm is' drawn upwardly the parts will assume the position indicated in Fig. 3 and the dust ladened air will be drawn through the inlet 7 and the observation glass 8 into the filter- Y The air then passes rthrough the apertui'ed -plate 10 and the filtering fabric 11 so that all foreign matter such as dirt, dust and other impurities are removed from the air and retained in the chamber 9 of the drawer 6 which latter may be readily removed when it is desired to empty the same. The purified air next passes into the chamber 14 through the inlet 13 in the top 12 of the base 1 thence through the inlet ports 16 into the pulsation cham ber 31, it being understood that the valve 17 is iiow in the position indicated in Fig. 3, the construction being such that a clearance chamber of considerable area relative to the'- short, rapid stroke of the diaphragm is provided, as will be understood from said Fig.

3. On the downward movementof the diaphragm 30 the valve 1-7 will be closed and the valve 27 will open against'the tension of the springs 28, whereupon the air in the pulsation chamber 31 will pass therethrough*l through the ports S26 into the chamber 25 in the pump casing 15, thence through the portsH 49 into the pressure chamber 53 in which?l the motor is located, and therefrom tlirougl the main exhaust port 50 to the atmosphere. AWhen it is desired to employ the pump forv blowing purposes the hose is connected with the exhaust outlet 50 as will beapparent to those skilled in this art.

Special attention is directed to the novel manner in which the diaphragm is directly connected w'ith the shaft of the motor.A since no pivot -or hinge connection is employedv but in lieu thereof we employ a direct connection one end of such rod being mounted 4 on the crank of the motorwhile the other .end thereof is fastened directly to the diaphragm and since the outer periphery of the diaphragm is rigidly supported and cooperates with the valve controlled ports leading to the pulsation chamber we are enabled by our construction to produce vhighly advantageous and reliable results.

By employing a light 'motor of high speed, an air. pump for vacuum cleaners may be so we claim as new and constructed that the entire cleaning device is of very little weight and canbe readily transported from one place to another and althoughin the present instance we have shown the base of the device as being provided with suitable rollers it will be apparent that these if desired maybe dispensed `with in practice.

While in the present instance we have shown the outer casing as having an elongated form it is to be understood that av casing having any desired 4contour may be employed and still be within the scope of our invention.

It will now be apparent that we have devised a novel anduseful construction which embodies'tlie features of advantage enumerated as desirable inthe statement of the' invention l and the above description and while we have inthe present instance shown and described a preferred embodiment thereof which has been foundin practice to give satisfactory and reliable, results, it is to be understood that the same is susceptible of modification in various particulars withf` out departing from the spirit or scope of our invention or sacrificing any of its advan- Y tages.

lellatory and reciprocatory movement With- Yina portion only of said pumping chamber, 'whereby a relatively large clearance space is' provided, a pressure chamber, into which Wtlie purified airis discharged, an electric motor in saidV pressure chamber, a crank operated by said motor, and a direct connection from said crank to said connecting rod for actuating the latter. A

2. In a vacuum pump, a vacuum chamber into which the fluid is initially conducted, a

' pulsation chamber having a valved inlet .thereto from said vacuum chamber, pumping mechanism coperating with said pulsation chamber, and comprising a flexible diaphragm having its outer periphery suitably supported, means for .retaining said outer periphery Lin position, a connecting rod, having one end non-pivotally secured to said diaphragm, whereby the latter receives a combined oscillatory and reciprocatory movement within 'afportien only of said pumping chamber, whereby a relatively 1large clearance space is provided,a pressure chamber having a v alved outlet thereto from said pulsation chamber, said pressurev chamber having a restricted outlet therey from, whereby a requisite` body fof .com-

pressed fluid is retained in said pressure chamber during the reciprocations of said motor, an electric motor, and connections from said motor to said 'connecting-rod for voirsand ports, pumping` mechanism cooperating with said pulsation chamber and comprising a flexible diaphragm having its outer periphery suitably supported, means .for maintaining said outer periphery in position, an electric motor in one of said reservoirs, a connecting rod having one end secured to said diaphragm, whereby the latter receives a combined oscillatory and reciprocatory movement within a portionA only of said pumping chamber, whereby a relatively large clearance space is provided, a crankV operated by said `motor, and a connection from said crank to said connecting rod for actuating the latter. l

4. In a' pumping apparatus, a vacuum reservoir, having a restricted inlet port, a pressure reservoir having a'restricted outlet port whereby the apparatus can be used as a blower, .a pulsation chamber intermediate said reservoirs, pumping mechanism Acooperating with said pulsation chamber and comprising a exible diaphragm having its outer 'periphery suitably supported, means for mantaining said outer periphery in position, aconnecti'ng rod having one end nonpivotally securedto said diaphragm, wherel by the latter receives a combined oscillatoryv and reciprocatery movement vwithin a po-rtion only of said pumping chamber, whereby a relatively large clearance'space is provided, an electric motor located .within one of said reservoirs, and a direct connection from said motor to said connecting rod for actuating the same.

THEODORE WEDEMANN.

JOSEPH H. TEMPLIN.

'Witnessesz H.' S. FAIRBANKS,

' G. D. MGVALv -iil 

